Boeing hasn't issued a statement about its scheduled delivery of the first 787 to All Nippon Airways in the first quarter 2011, but the Aviation Week report cites sources that say a delay is inevitable.

Why? "Late design changes" and other out-of-sequence work that must be incorporated into new production aircraft as well as the 22 787s that have already been completed, according to the report.

The aircraft is now pushing three years late on its original timeline.